Frog orchid or long-bracted orchid | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Asparagales |
Family: | Orchidaceae |
Subfamily: | Orchidoideae |
Genus: | Dactylorhiza |
Species: | D. viridis |
Binomial name | |
Dactylorhiza viridis | |
Synonyms [1] | |
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Dactylorhiza viridis, the frog orchid, is a species of flowering plant in the orchid family Orchidaceae. [1] [2] It has also been treated as the only species Coeloglossum viride of the monotypic genus Coeloglossum. [3] [4]
The plant arises from fleshy, forked roots and ranges in height from 10 to 55 cm. The leaves of D. viridis are 5–14 cm long and 2–7 cm wide; leaves at the base of the orchid are obovate to elliptical, while leaves higher on the stem become lanceolate. Two to six leaves are found on one plant, and leafing is alternate.
The inflorescence of the orchid is a dense raceme (spike-like cluster) containing 7 to 70 small flowers. Flowers are greenish in color, and often tinged with purple, reddish, or red-brown color. The flowers are subtended by conspicuous long, tapering bracts which are 1–6 cm long, with the lower bracts longer and typically greatly exceeding the length of the flower. The sepals are oval with little or no point, 3–7 mm long and 2–4 mm wide and dark green. The sepals join with the petals to form a hood opposite the labellum (lower petal) of the flower. Petals are long and narrow, 3.5–5 mm long and about 0.5 mm wide, and curve inwards. The labellum is strap-shaped and usually split at the very tip to form two or three tooth-like divisions, with the middle tooth smaller than the others. It is 5–11 mm long and 1–4 mm wide. A 2–3 mm long nectar spur projects behind the labellum. [5]
Dactylorhiza viridis flowers in late May and early June. It is either pollinated by bees and small wasps, or reproduces autogamously by incoherent pollinia; that is, the pollinia crumble and some pollen falls on the stigma, fertilizing the flower. [6]
In North America, Dactylorhiza viridis can be mistaken for Platanthera flava (the pale green orchid), but can be best distinguished by the labellum, which is notched at the apex and does not have the tubercle of P. flava.
Dactylorhiza viridis has a wide distribution across the cooler parts of the Northern Hemisphere, covering much of Europe, non-tropical Asia (Russia, Japan, China, the Himalayas, etc.), much of Canada and parts of the United States (Alaska, Northeast, the Appalachians, Great Lakes Region, Northern Great Plains, and Rocky Mountains). [1] [7] [8] [9] It is typically found growing in moist, rich soil in wet meadows, moist or wet deciduous woods and thickets, [10] and is frequently found on steep slopes.
Dactylorhiza viridis is mainly pollinated by beetles and a wide range of Hymenoptera including ants. [11]
This orchid species is able to form symbiotic partnerships with a variety of mycorrhizal fungi including Ceratobasidium sp., Epulorhiza anaticulata , Moniliopsis anomala, Rhizoctonia sp., Tulasnella cucumeris and Tulasnella calospora. [12] [13]
The chemistry of a variety that has been known as bracteatum is complex, featuring a wealth of bioactive constituents, at least seven of which are peculiar to the plant. Known compounds found thus far to be present are 4-hydroxybenzaldehyde, 4-hydroxybenzyl alcohol (=Gastrodigenin), 4,4'-dihydroxydibenzyl ether, 4,4'-dihydroxydiphenylmethane (see Xenoestrogen), 4-(4-hydroxybenzyloxy)benzyl alcohol, gastrodin, quercetin-3,7-diglucoside (see Flavonol glycoside), thymidine, loroglossin, militarine, dactylorhin A, dactylorhin B, β-Sitosterol and daucosterol. [14]
Orchids are plants that belong to the family Orchidaceae, a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant.
Ophrys apifera, known in Europe as the bee orchid, is a perennial herbaceous plant of the family Orchidaceae. It serves as an example of sexually deceptive pollination and floral mimicry, as well as of a highly selective and highly evolved plant–pollinator relationship.
Anacamptis pyramidalis, the pyramidal orchid, is a perennial herbaceous plant belonging to the genus Anacamptis of the family Orchidaceae. The scientific name Anacamptis derives from Greek ανακάμτειν 'anakamptein' meaning 'bend forward', while the Latin name pyramidalis refers to the pyramidal form of the inflorescence.
Dactylorhiza fuchsii, the common spotted orchid, is a species of flowering plant in the orchid family Orchidaceae.
Dactylorhiza majalis, the broad-leaved marsh orchid, is a terrestrial Eurasian orchid.
Spiranthes spiralis, commonly known as autumn lady's-tresses, is an orchid that grows in Europe and adjacent North Africa and Asia. It is a small grey-green plant. It forms a rosette of four to five pointed, sessile, ovate leaves about 3 cm (1.2 in) in length. In late summer an unbranched stem of about 10–15 cm (3.9–5.9 in) tall is produced with approximately four sheath-shaped leaves. The white flowers are about 5 mm (0.20 in) long and have a green spot on the lower lip. They are arranged in a helix around the upper half of the stalk. The species is listed in Appendix II of CITES as a species that is not currently threatened with extinction but that may become so. Autumn lady's-tresses are legally protected in Belgium and the Netherlands.
Neottia ovata, the common twayblade or eggleaf twayblade, is a terrestrial orchid widespread across much of Europe and Asia
Dactylorhiza maculata, known as the heath spotted-orchid or moorland spotted orchid, is an herbaceous perennial plant of the family Orchidaceae. It is widespread in mountainous regions across much of Europe from Portugal and Iceland east to Russia. It is also found in Algeria, Morocco, and western Siberia.
Dactylorhiza sambucina, the elder-flowered orchid, is an herbaceous plant belonging to the family Orchidaceae. It is quite common and widespread throughout much of Europe from Portugal east to Finland and Ukraine. The flowers appear in spring and summer, in various colors from yellow to purple.
Bulbophyllum baileyi, commonly known as the fruit fly orchid, is a species of epiphytic or lithophytic orchid that is native to Queensland and New Guinea. It has coarse, creeping rhizomes, curved, yellowish pseudobulbs with a single thick, fleshy leaf, and a single cream-coloured flower with yellow, red or purple spots. It grows on trees and rocks in open forest, often in exposed places.
Bulbophyllum bracteatum, commonly known as the blotched pineapple orchid, is a species of epiphytic or sometimes lithophytic orchid that is endemic to eastern Australia. It has crowded pseudobulbs, tough, pale green or yellowish leaves and up to twenty five cream-coloured to yellowish flowers with purplish or reddish blotches. It usually grows in the tops of rainforest trees.
Leporella fimbriata, commonly known as hare orchid or fringed hare orchid, is the only species in the flowering plant genus Leporella in the orchid family, Orchidaceae and is endemic to the southern Australia mainland. It is related to orchids in the genus Caladenia but has an unusual labellum and does not have hairy leaves. Its pollination mechanism is also unusual.
Lyperanthus, commonly known as beak orchids, is a genus of flowering plants from the orchid family, Orchidaceae, that is endemic to Australia. There are two species, one in Western Australia and the other in four eastern Australian states, distinguished by their single long, narrow, leathery leaf and dull coloured flowers which have prominent short calli on their labellum. Both form loose colonies which reproduce asexually from their tubers, and sexually using their flowers.
Pyrorchis, commonly known as beak orchids, is a genus of flowering plants in the orchid family, Orchidaceae and is endemic to Australia. It contains two species which were previously included in the genus Lyperanthus, also known as beak orchids. Both species have fleshy, oval leaves and form colonies which flower profusely after bushfires.
Caleana, commonly known as duck orchids, is a genus of flowering plants in the orchid family, Orchidaceae that is found in Australia and New Zealand. The Australian species are found in all states but have not been recorded in the Northern Territory. Duck orchids have a single leaf and one or a few, dull-coloured, inconspicuous flowers. Most species are found in Western Australia but one species occurs in eastern Australia and one occurs in eastern Australia and New Zealand. Orchids in this genus as well as the hammer orchids (Drakaea) are pollinated by male thynnid wasps.
Cryptostylis erecta, commonly known as the bonnet orchid or tartan tongue orchid , is an orchid endemic to south eastern Australia. A small and common plant, it has dark green lance-shaped to egg-shaped leaves and up to twelve greenish flowers with a large, bonnet-like or hood-like, lilac-coloured labellum with a network of purple veins.
Corybas aconitiflorus, commonly known as the cradle orchid or spurred helmet orchid, is a species of terrestrial orchid endemic to eastern Australia, occurring from south-east Queensland to Tasmania. The small flowers have a hooded appearance as the uppermost sepal hides most of the rest of the flower. It is the type species of the genus Corybas.
Dactylorhiza majalis subsp. traunsteinerioides, known as the narrow-leaved marsh-orchid and Pugsley's marsh orchid, is a subspecies of Dactylorhiza majalis found only in Britain and Ireland. It is also treated as the species Dactylorhiza traunsteinerioides.
Corybas papa is a species of terrestrial orchid endemic to the North Island of New Zealand. It has a solitary wedge-shaped leaf and single translucent green flower with a strongly deflexed labellum and slender, threadlike lateral sepals and petals.